Office chair



FIG. 1 is a perspective view of a first embodiment of an office chair showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view of a second embodiment of an office chair showing my new design;

FIG. 9 is a front plan view thereof;

FIG. 10 is a rear plan view thereof;

FIG. 11 is a right side view thereof;

FIG. 12 is a left side view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The broken line showing of environment is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for an office chair, as shown and described. 